Radiator or cooler



July 28, 1931- s. 2. DE FERRANTI ET AL 1,816,111

RADIATOR OR COOLER Filed May 2, 1929 4 Sheets-Shee't l Fig.1. K

m A/Qv Tales y- 1931- s. 2. DE FERRANT! ET AL 1,816,111

RADIATOR OR COOLER Filed May 2, 1929 4 Sheets-Sheet 2 July 28, 1931. s.2. DE FERRANTI ET AL 1,316,111

' RADIATOR 0R COOLER Filed May 2, 1929 4 Sheets- Sheet 3 Fig.5.

3, Z.$ rwm-ki 9 {I downer Nv NT'd Z July 28, 1931. s. 2. DE FERRANTI ETAL 1,816,111

RADIATORIOR COOLER v I Filed May 2, 1929 4 Sheets-Sheet 4 5- Z. sgevrani, 9-

Patented July 28, 1931 EBASTIAN mm inn 'FTERRANTIAND aoimjmuimea, or

sioLLmwoon, ENGLAND, As-

' sIGiioRsuo-rnRRANTI' me, or nuwyonnu. Y.

- RAIiIATOR R accrue I n ipiieauon fiieaira a; =1eaa,:seria1:no. eale-mama mama m a, 1928.

p This inventionirelatestoradiators.or coolers more particularly for usein connection with oil immersed :electric transformers.

' T The' invention :has for its object to provide improvedconstructiou's of radiatorsor cooler's particularly from the point: ofview of ease of manufacturezanderectionand efficiein vcy of aircirculation; I

Theinvention isparticiilarly applicable in j connection withconstructions in accordance with the British specification No. 2815l/27(Patent No. 299,998).

er unit comprisinga plurality of tubes constructed from welded sheetmetal, each tube being joined to its neighbour by a tubular distancepiece. I i

The invention consists in a radiator or cooler unit comprising aplurality of tubes constructed from welded sheet metal, each tube beingprovided with an externally or internally flanged tubular elementpreferably formed from the tube sheet for welding, brazing or otherwisejoining each tube to its 5 neighbour.

The invention also consists in a radiator or cooler unit as set forthabove, mounted upon a supporting arm furnished with a plurality oflongitudinal ribs which impart rigidity with introduction of a minimumof constriction to flow of cooling medium.

The invention also consists in a radiator or cooler unit as set forthabove wherein said arm is formed of bent sheet metal elements v A twoflat -S1ClS of each tube are spot welded riveted, screwed or weldedtogether.

The invention also consists in a radiator or cooler unit as set forthabove, including a tube traversing the distance pieces or flangedportions and constituting a stiffener and a support for the unit, andthe means of attachment of the unit to the appliance to be cooled.

The invention also consists in a radiator or cooler unit as set forthabove, wherein the tubes are fashioned in such a manner as to permitdirect and easy welding, either internally or externally, to provideintegral passages of sufficient area to effect uniform distribution ofthe heating or cooling fluid to the various elements of the radiatorunit I elements thereof. The invention consists in a radiator orcoolwithoutthe userof a header orseparatemol lecting chamber.

The nvention also-consists in radiators scribed. I Referring tothe'accompanying diagrammat c drawings I Figure 1 illustrates a verticalcrossesectional view of .a convenient construction in accordance withthe present invention.

Figure 2 is a, front view of one of the or coolers Zsubstantially ashereinafter de- :Figure. '3 is an enlarged vertical cross-sectional viewof-a detail. Figurelis a'front view of a modified construction. Figure 51s averticalcross=seetion on the line A-A of Figure 4. I I

Figure 6 is a further enlarged fragmental plan view thereof. I

Figures '7 and ,8 are diagrammatic views illustrative of modifiedmethods of construction, and

Figure-9 isa cross-sectional view of a modiiied .form of supportingmember for the radiator or cooler unlts.

, In carrying the invention into effect in .one'convenient form by wayof cxampleas .iilnstrated in F gures 1 plurality :of fiat tubes to 3, weprovide a I a, each of which is formed by pressing from sheet and byweloing at the joint or joints. The flatsides of '.the :tuhe are formedwith lateral stiffening iibs 7) by pressing out the sheets and the Theflanges may be external as indicated at f in. Figure 9 if desired.

' The'orifiees at the points of attachment of tubular members d may becircular shown or of any desired shape.

In order to mount and support alunit formed of such elements we insertthrough the tubular members 01 at each end a length of'tubing gfurnished with or without a flange for attachment to the transformercasing m (or other apparatus to which the cooler is to be applied). Thistube is slotted at intervals so that a substantially uniform circulationof cooling liquid through the 7 various parts of the unit is assured andthe upper tube of each pair is furnished with a flanged member Twoflanged tube elements j'are rigidly attached to the supporting tubes bywelding, and end caps are fitted to the end of the supporting tubesremote from the tank.

Theend of the lower tube 9 of each pair is adapted to be drawn against aseating in r a member is welded to the casing m.

In some cases we provide tubular distance pieces 0 which are internallyflanged for example as illustrated in Figure 8 and attached to the tubesheets, e. g. by welding the flanges V I to the sheets.

' Again in some cases we provide arms of angle section havinglOIlgltLlCllnELlTlbS upon I which theradiator elements rest withoutconstricting to any appreciable extent thefree circulation of coolingmedium. Convenientstructure imposing a minlmum of circulation ly sucharms may be-c'onstructed of three sheetelement's a (Figure 9) which maybe spot or roller welded, screwed or riveted toing each pair ofelements, a surfaceon each element welded to an abutting parallelsurface on the adjoining distance piece.

2. A heat exchanger as claimed in claim 1, wherein said separate hollowrigid supporting member comprises bent sheet metal elements rigidlysecured together.

3. A heat exchanger as claimed in claim 1 wherein said separate hollowrigid supporting member comprises a perforated tubesubstantially asdescribed.

In testimony whereof we have signed our names to this specificationSEBASTXAN ZIANI DE FERRANT'EQ JOHN'TUR NER;

gether to yield an extremely simple yet strong restriction. V 1

It will be appreciated that by these constructions enhanced freedom ofcirculation of air is also provided since the distance pieces (e. g. 61Figure 3 or 0 Figure 8) and pressedout or pressed-in flanges, united bywelding,

may be of conslderably smaller external dimension than the width of theradiator tubes.

According to a modification in which instead of arranging the radiatorunits radially Wto the tank as in the example described with referenceto Figures 1, 2 and 3 they are ari ranged tangentially as illustrated inFigures 4: to 6'we provide a T piece 39 connected to the i tank fromwhich supportingtubes g or ribbed arms extend both ways for carryingandconveying circulating fluid to sets of radiator tubes formed as aboveand attached in the like manner toeach other and to the supportingtubes;

The spot welding at 0 between the two sides ,of each flattened tube amay be performed between every lateral stiffening portion 6, be-

S tween alternate lateral stiffening portions, or

' just as desired I in order to impart the required stlffness. 4 r

The examples described above are particu: larly applicable in connectionwith constructions according to British specification No.

28154/27 (Patent-No.'299,998), but the invention maybe applied in aVariety of ways iii)

